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Патент USA US3073920

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Jan. l5, 1963
3,073,910
J. J. CUNNINGHAM
AUTOMATIC DIALING ATTACHMENT FOR TELEPHONES
Filed Jan. 19, 1959
5 Sheets-Sheet 1
145x.:
i?
_i
‘s
INVENTOR.
Jan. 15, 1963
J. J. CUNNINGHAM
3,073,910
AUTOMATIC DIALING ATTACHMENT FOR TELEPHONES
Filed Jan. 19, 1959
5 Sheets-Sheet 2
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56
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Jan. 15, 1963
3,073,910
J. J. CUNNINGHAM
AUTOMATIC DIALING ATTACHMENT FOR TELEPHONES
Filed Jan. 19, 1959
5 Sheets-Sheet 3
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BY
Jan- 15, 1963
J. J. CUNNINGHAM
3,073,910
AUTOMATIC DIALTNG ATTACHMENT FOR TELEPHONES
Filed Jan. 19, 1959
5 Sheets-Sheet 4
` INVENTOR.
JÄMÄJ u? CUJYMNGHÄM
BY
’
¿Train/Elf
Jan. 15, 1963
J. J. CUNNINGHAM
3,073,910
AUTOMATIC DIALING ATTACHMENT FOR TELEPHONES
Filed Jan. 19, 1959
5 Sheets-Sheet 5
it
States Patent O‘”
3,073,910
Patented Jan. 15, 1963
2
1
FIGURE 16 is a View similar to FIGURE 15, with the
switch in a circuit open position.
Referring now to the drawing, and more particularly
to FIGURES l to 3 thereof, an automatic dialing unit 20
for dial telephone systems made in accordance with the
present invention is shown to include a housing 22 having
3,073,910
AUTOMA'HC DIALING ATTACHMENT FÜR
TELEPHONES
.lames J. Cunningham, Jackson Heights, N.Y.
Filed Jan. 19, 1959, ser. No. 787,397
8 Claims. (Cl. 179-90)
a central storage compartment and a closure 23 remov
ably mounted thereupon. The closure 23 is provided
with a plurality of spaced apart parallel slots 24 disposed
ticularly, to dial telephone systems.
Almost every office, home, and business has certain 10 in a side by side parallel relationship, each one of which
This invention relates to telephones and, more par
slidably receives the stem 26 of a knob 28 therethrough.
The inside surface of the closure 23 adjacent to each such
slot 24 is provided with a longitudinal groove 30 within
which a shield 32 is slidably supported for maintaining
matic dialing attachment for dial type telephones that 15 the slot 24 in a dustproof closed condition at all times.
A> plunger 34 integral with the slide 32 and knob 28 is
will dial such frequently called numbers in response to a
provided with a concave spoon-like portion 36 at its inner
simple actuation of a housing mounted slide.
most end for effecting actuation of gear means also form~
Another object of the present invention is to provide
ing a part of the present invention.
slide actuated automatic telephone dialing equipment that
With further reference to FIGURES 4 and 5 of thel
can be conveniently reset or adjusted in a simple cr efñ
drawing, each linear slide 32 and associated depending
cient manner so as to readily change the numbers set to
plunger 34 is shown to be disposed in alignment with a
be automatically dialed.
rack gear 40 that is slidably supported within the housing
Still another object of the present invention is to pro
22 in any suitable manner. The spoon-like recess 36 of
vide a virtually foolproof automatic dialing attachment
for telephones that will accurately and' quickly dial pre' 25 the plunger 34 is shown in facing engagement with a pin
38 integral with the rack gear 40 so as to effect longi
determined telephone numbers in response to a single
tudinal movement of the rack gear in response to longi
actuating movement.
tudinal movement of the knob 28 in one direction. The
A further object of the present invention is to provide
rack gear 40 includes teeth 42 that are in meshing engage
automatic dialing equipment of the type described that
can be conveniently attached to all types of dial tele 30 ment with the teeth 44 of a pinion 46 secured to a trans
verse shaft 48 upon which a control Wheel 66 is also
phone equipment and which can be mass produced. in
secured.
large quantities at a relatively low cost.
Another rack gear segment 200 is slidably supported
All of the foregoing and still further objects and ad
in alignment with the main rack gear 40 to be moved
vantages of this invention will become apparent from a
study of the following specification, taken in connection 35 in one direction by the longitudinal movement of the
numbers that are frequently called, in which accuracy and
time is extremely important, such as when dialing emer
gency fire, police, and medical numbers. It is therefore
an object of the present invention to provide an auto
with the accompanying drawing, wherein:
,
FIGURE l is a perspective View of an automatic dial
ing unit made in accordance with one form of the present
invention;
main rack gear 40 in the one direction of movement of
the knob 28. The adjacent end 44> of the main rack
gear 40 is receivable within the recess 46 in the facing
end of the rack gear segment 200, so as to maintain the
FIGURE 2 is an enlarged fragmentary cross sectional 40 parts in interlocked engagement during the aforemen
tioned movement of the rack gear 40. The rack gear
segment 200 is also provided with teeth 49 that are in con
view taken along line 2-2 of FIGURE l;
FIGURE 3 is an enlarged fragmentary perspective
view of certain operating parts of the present invention;
FIGURE 4 is a longitudinal cross sectional view taken
along line 4-4 of FIGURE 2;
FIGURE 5 is a transverse cross sectional View taken
along line 5_5 of FIGURE 4;
FIGURE 6 is a view similar to FIGURE 5, showing
stant meshing engament with similar teeth 50 of a cylin
drical pinion 52 that is rotatably mounted by means of
45 extensions 54 upon bearings 56 carried by the housing
22. A torsion spring 202 secured at one end to the hous
ing 22 and at the opposite inner end to the cylindrical
pinion shaft 54, yieldably resists rotation of the cylindrical
pinion 52 in the one direction in which it is urged by the
a slightly modified arrangement;
FIGURE 7 is an exploded perspective view of a dial 50 rack gear segment 200 in response to the movement of
the associated knob 28 in the aforementioned one direc
control Wheel assembly forming an operating part of the
tion. However, in response to release of the knob 23,
the torsion spring 202 is operative to eifect rotation of
the pinion cylinder 52 in an opposite direction, to cause
FIGURE 9 is a plan view of a slightly modified type 55 the return of the rack gear segment 200 toward the initial
position into abutment with the main rack gear 40 which ,
of control wheel unit for use in automatic long distance
is also returned to the initial position during such return
dialing equipment;
movement of the torsion spring 202.. During this return
FIGURE l0 is a fragmentary perspective View of still
movement of the rack gear 49, the rotation of the con
other operating parts of the present invention;
FIGURE ll is a fragmentary perspective View of a 60 trol wheel 66 is operative to effect actuation of an elec
trical switch unit, as will be hereinafter more fully
Aslightly modilied form of control mechanism;
described.
FIGURE 12 is a bottom plan view of certain parts of
However, as is more clearly shown in FIGURE l0 of
the structure shown in FIGURE ll;
the drawing, a pallet ‘62 and associated ratchet wheel 60
FIGURE 13 is a front elevational view of the assembly
65 are provided for exerting a braking action which will re
shown in FIGURE ll;
tard the return movement of the pinion cylinder 52 so
FIGURE I4 is a fragmentary bottom perspective View
that the switch element is actuated at a relative uniform
of certain parts of the clutch mechanism forming a part
speed. While the pallet 62 mounted upon a pivot pin 64
of the structure shown in FIGURES l1 to 13;
is shown as one means of providing such braking action,
FIGURE l5 is a fragmentary plan view of certain
70 it is to be understood that other types of braking ele
parts of the structure shown in FIGURE 11 with the
ments, such as friction brakes, may be provided for this
switch in a normally circuit closed position; and
purpose.
,present invention;
FIGURE 8 is a perspective view of one of the seg
ments of the wheel shown in FIGURE 7;
3,073,910
3
Referring now more speciñcally to FIGURES 4 and 7
of the drawing, a control wheel assembly 66 made in ac
cordance with one form of the present invention is shown
to be mounted upon a shaft 48 that is rotatably received
4
taining the control wheel in an initial position.
The
detents 82’ of the control wheel are more blunt and serve
at one end within a bearing 47 and has a retractable de
as cams for effecting longitudinal movement of the
plunger 102 of each make-break switch 104 that controls
the dialing system through the associated lead wires 106.
tent 51 at the opposite end that releasably secures it
The clutch unit includes a pair of diametrically oppo
within a socket 55 of an open bearing 53, thus enabling
sitely disposed pins 108 that are integral with the bottom
plates 68 of the control wheel and which pivotally sup
port stop elements 110 that are movable into abutment
such shaft 48 to be readily removed for changing the
character of the control wheel 66. However, each such
control wheel 66 includes a base plate 68 with a plurality 10 with slightly spaced apart pins 114. The pinion 46 in~
of circumferentially spaced apart pairs of radially spaced
apart pins 70 that are received by corresponding open
ings 72 in a top plate 75. Certain ones of the pins are in
the form of threaded studs 74 which serve to secure the
cludes a pair of diametrically opposite drive pins 112
that are rotatable into abutting relationship with the stops
110. As is clearly shown in FIGURE 12 of the drawing,
rotation of the pinion 46 of the drive pins 112 in one direc
base plate 68 and top plate 75 together, such as by nuts 15 tion is operative to bypass the stops 110, thus allowing
76. Sandwiched between the base and top plates 68, 75,
the control wheel to remain in a stationary position.
are seven segments 78, each of which is, provided with, a
However, rotation of the pinion 46 and drive pins 112 in
pair of openings 80 for receiving the positioning~ pins
the opposite direction causes the stops 110 to abut with
therethrough and peripheral detents 82 that actuate a one
the spaced pins 114 and thus serve as a positive stop for
way trip plate S4 pivotally mounted upon a hinge pin 86
abutment with the drive pins 112, so as to carry the
and associated with a trip lever 88. The lever 88 is
control wheel therewith. It is during rotation of the con
operative to depress the plunger 90 of an impulse switch
trol wheel at this time that the detents 82’ effect actua
92 having lead lines 94 which may be connected to the
tion of the plunger 102 of the make~break switch 104.
telephone circuit. While rotation of the control wheel
As a result, this clutch mechanism takes the place of the
66 in the one direction caused by the manual movement 25 one way trip plate 84 described in connection with FIG
of the knob 28 and rack gear 40 actuates the one way
URES 1 to 5 of the drawing which is movable to a dis
trip plate 84 without actuating the plunger 90 of the
placed position 84a with effecting actuation of the switch
switch 92, rotation ofl the control wheel 66 in the oppo
plunger 90 during the first movement of the knobs 28. It
site direction by the return movement of theY rack gear
will be further noted by particularly referring to FIG
40 by the torsion spring 501 enables the` detents 82. to ac 30 URE 15, that the plunger 102 acts as a clutch to assist
tuate the plunger 90 one time for each one of the detents
in maintaining the control wheel in its proper position.
82 carried by each segment. It will also be noted that the
It will now be recognized that a system has been pro
control wheel will be so positioned at the start of the
vided which can be readily adapted to all types of do
operation, that the first proper segment which provides
mestic, industrial, and commercial types of installations
the ñrst digit of the number to be dialed will be adja 35 for automatically dialing predetermined numbers in a
cent the plunger 90, and the following digits will be ob
simple and eiiicient manner. One of the main features
tained by the segments being arranged in sequence cor
of the present invention is that the control wheels may
responding to the digits. It will now be recognized that
be conveniently removed and reset at any desired time.
each such segment 78 represents one digit of a seven digit
While this invention has been described with particu
telephone number, the number of such detents 82 carried 40 lar reference to the construction shown in the drawing,
by` each segment identifying the particular digit` of the
number. Therefore, by selecting segment plates 78 hav
it is to be understood that such is not to be construed as
imparting limitations upon the invention, which is best
deñned by the claims appended hereto.
ing the proper number of detents 82. and arranging them
upon the control wheel 66, as shown in FIGURE 7,
Having thus described my invention, I claim as new and
the mechanical equivallent of the telephone number can 45 desire to secure by Letters Patent:
be readily reproduced for making and breaking the circuit
1. An automatic dialing attachment for dial telephones
through the switch 92 in a well known manner. In
comprising, in‘ combination, a rigid housing having a
FIGURE 9 of the drawing, a ten digit telephone number
central compartment, a closure removably carried by said
control wheel is shown wherein each segment plate 78’
housing, an electrical impulse producing switch means,
has detents 82’ and mounting holes 72’ so as to enable 50 said switch means` being supported within said housing,
the control unit to be used for automatically dialing long
said switch means including mechanical means movable
distance telephone numbers on newer dialing equipment.
between circuit open and circuit closed positions to pro
In FIGURES l to 5, the unit is shown to include a
duce electrical impulses, rotatable means mounted within
plurality of assemblies, each one of which may be set to
said housing, said rotatable means actuating said mechan
automatically dial a separate number. These assemblies 55 ical means, linear slide means carried by said closure
are mounted within the housing in spaced apart parallel
for imparting motion to said rotatable means, said rotat
relationship. However, in FIGURE 6 of the drawing, a
able means comprising a circular wheel, a plurality ot'
slightly modiñed form of construction is shown in which
interchangeable segments carried by said circular wheel
the assemblies are mounted in spaced apart staggered
facilitating a connection with a telephone in the dial sys
relationship for conserving space and providing more 60 tern, each one of said interchangeable segments carried by
compactness. In this embodiment, corresponding parts
said wheel having a predetermined number of peripheral
are` identified by the same reference numerals associated
with the aforementioned arrangement, for purpose of
clarity. However, because of the staggered relationship
projections in sliding engagement with said mechanical
means, said linear slidef means comprising a plunger slid
ably carried by said closure for reciprocating longitudinal
between certain parts, the control knobs 28a, 28b are 65 movement, and gear means acting between said plunger
provided with plungers 34a, 34b of different lengths.
and said wheel translating said sliding movement of said
Reference is now made to FIGURES 11 through I6
plunger into rotational movement of said wheel.
of the drawing, which illustrate a modified type of con
2. An automatic dialing attachment as set forth in claim
trol wheel assembly and driving mechanism 100. In this
embodiment, which utilizes a control wheel substantially 70 1, wherein said switch means includes a plurality of said
electricalimpulse producing switches and associated ac
identical to that illustrated in FIGURE 7 of the drawing,
tuating means mounted in side by side relationship.
the control wheel is caused to rotate only in response to
3. An automatic dialing attachment as set forth` in
rotation of the pinion shaft 48 and pinion 46 in one. di
claim 1, wherein said switch means includes a plurality
rection, while during rotation of such pinion 46 in the
opposite direction, clutch means are provided for main 75 of said electrical impulse producing switches andasso
3,073,910
6
5
ciated actuating means mounted in oppositely facing stag~
gered relationship.
4. An automatic dialing attachment as set forth in claim
1, wherein said gear means comprises a rack gear -slida
bly supported within said housing for reciprocating lon
gitudinal movement, a pinion carried by said Wheel, and
said plunger having means for effecting longitudinal
movement of said rack gear in one direction.
5. An' automatic dialing attachment as set forth in claim
in one direction, spring means for effecting movement
of said rack gear in an opposite direction to etîect rota
tion of said pinion in an opposite direction, and one way
clutch means acting between saidl wheel and said pinionA
for eiïecting rotation of said wheel with said pinion in
said opposite direction of rotation of said pinion only.
8. An automatic dial attachment as set forth in claim
7, wherein said mechanical means comprises a plunger
supported for reciprocating longitudinal movement be
4, further comprising spring means for effecting longi 10 tween a normal outer circuit closed position and an in
tudinal movement of said rack gear in an opposite direc
tion.
6. An automatic dialing attachment as set forth in claim
ner circuit open position, and said plunger slidably en
5, wherein said mechanical means comprises a one way
posite direction.
trip plate responsive to actuate said switch means in re 15
sponse to rotation of said wheel in said opposite direction
gaging said peripheral projections of said wheel for ac
tuation in response to rotation of said wheel in said op
References Cited in the tile of this patent
only.
7. An automatic dialing attachment as set forth in claim
1, wherein said gear means comprises a rack gear slidably
supported within said housing for reciprocating longitu» 20
dinal movement, a pinion mounted concentric with said
wheel for rotation independently thereof, said plunger
having means for eiîecting longitudinal movement of said
rack gear in one direction to effect rotation of said pinion
UNITED STATES PATENTS
2,086,110
2,032,229
2,036,037
2,063,830
2,890,287
Allen _______________ __ July 6,
Servanton ___________ __ Feb. 25,
Goff _______________ __ Mar. 31,
Rouse ______________ __ Dec. 8,
Goldschmidt _________ __ June 9,
1935
1936
1936
1936
1959
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